Trimming mechanism for sewing-machines.



1. HINKLEY. TRIMMING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG-1. I9I0.

1,157,000. Patented Oct. 19, 1915.

2 SHEETS-SHEET I.

. J HINKLEY. TRIMMIN G MECHANISM FOR SEWING MACHINES. APPLICATION FILEDAUG.1.19'10.

Patented 0013.19, 1915.

2 SHEETSSHEET 2.

Attorney! coLrMmA manor-luv" C0..WASH|NUTON. D. c.

,IHEINKLEY, Marianne-N, mew-moan, Assistance re un-Ion srEo-IA-n m es 7'GQMPANYQQF GfiIGAGQiLLIQIOIS, noonronn'rren or ILLINOIS. r

" j :rR IMMING Mnorn' ilvrs 'a re n .snwinlegmnoailhn'sj fi o-ail whoma: may concern:

.Be it known that I, JArmsiHrn'KL'EL a f citizen of the United States,residing at,

iHa gama-n, inttzh'e county .of- Montgomery,

State of New York, have invented certain 1 new and :useful ImprovementsinTrim ning Mechanisms for SeWmg-Machmes, of which the following is adescription, meference being hard rtotheiaccompanying edrawvingand tothe letters and thereoni j 1 1 Theinvention relates an w and :usefulimprovements in ,tri'mmer mechanisms :for

semingmachines, and snore especially to sa tnnnmer 05f the ,-idharaetershown and (d6- scribed in the patent to Durand, No; 698,912,

granted .lLpril 529th, $962. A lnth'is patent the fabric is severed bytoggle trimming -bers,xwvhich :are provided 'with zcru shlirngior avbrachrrrg Esurfaces coiiperatrng tone vmth the other to separate theimateria il. In that the: fa-lyric .may b'e (separated an .ithis manner,consider-able pressure is )necessary between the itrinrmrirgmembers. Thepatent.

describes means for adjusting the Eposition of one trimming Imem'berrelative .to the other, whereby the separating ipressure between thetwomembers may be varied. It is round in-practioeth'at theen'echanis'm foradjusting the trimmer members relativeto each other in a device of thischaracter is apt to work loose and render the trimmer ineffective toperform its trlmming'action.

. An" object of the present invention is to provide means whereby onetrimming member may be adjusted relative to the other,

and locked in its adjusted position. A further object of the inventionis to provide means for adjusting one trimmer I. v 'i The upper toggletrimmer rests d rectly relative to the other, which includes a devicewhereby graduated adjustments may be sea cured. I

' These and other objects will in part be obvious, and will in part behereinafter more fully described. 7 I In the drawings'which' show by wayof illustration one embodiment 'of the invention, Figurel is a side viewof the trimming mechanism, the means for operating the same and theparts of thelmachine adjacent thereto; Fig. 2 is a similar view from theother side of the trimmer; Fig. 3 is a vertical section through theupper'toggle trimmer, showing the adjusting means; and Fig. dis a detailshowing the locking dog in plan figures of reference Jmarked P-atenteaGet; 19,1915. 7

view. Fig. '5 is a detail showing in side elevation the loelr'ingpawland ratchet wheel j I for holding the :nut in adjusted posi tions.

The bed rpla'tel of the sewing machine.

cavr.riies a braoket 2, on which is pivoted the lewer :teggle -ef thetrimming member's. ThQP'mZHHSlHLft 4 i's connected to a rock lever5,.an'dsaid rock lever in :turn moves the'feed dog backand forth inawell known manner. A braeketifi iis connec'ted to "the 'roc'k'dever 5and vibrates therewith. 'Said bracket at its, upper 81161 is :pivotallyconnected to a link7, ivlriichis pivoted at itsother end to the tog glemember 3. A bracket 8 is secured to the. bed plate'near5its1l'oaver=end, and lSitl'it aChGd by means of fanr'a'rm '9 atitsupper'end to the (overh angi ng farm 101 of the machine.

Trheiupper toggle member is provided with a tooth .=12,"which engages arecess 13 in :theilowerftoggle member 3, and as the lower toggle memberis-vibra'ted the upper toggle iinem'ber 1 11 avill be similarlyvibrated. The uppertoggle member 1'1 is pivoted to aismoim'tedjinza'slot216 formed in the bracket 8i ffSaiid iblockl-il-cairri'es lateral wings which 7 extend ower'rthe edges :of'the slot16, and are provided with slots 17, whichreceive screws 1:8; When the"screws 18 are'le'osened-fithe ib'lo'ok 14 may be adjusted vertically,and will carry with it "the upper toggle trimming member 11. Ascrew 19is threaded into the upper toggle trimming member, and extendsthrough a.slot-inthe block 14. 'AJtension.

plate 20 is mountedon the shankof the screw 15, andthe' screw 19 passesthrough said tension plate. 'Said' tensionplate operates to guide theupper toggle trimmer in its vibrations.

on the upper'surface of the lower trimming vmember, and said uppertoggle trimming member is provided with;v ablunt surface-.

,Lwhich operates to brush thematerial passing between the trimmingmembers, and-thus} separate the material.

The block 14:- is

moved downwardfso as to bringthe trinr,

mingmembers into proper cooperation by means of the wedge21, which hasathread 1 j i ed stem extending througha bearing formed inthe upperend'of the supporting bracket the wedge 21, and rests against the bear-Theilower face of the wedge 21 bearsg v. againstthe upper edge of-theblockl. An adjusting nut 22 is threaded on the shank of ing supportingthe wedge 21. By turning the nut 22 in the properdirection, the wedge 21may be drawn to the right, as viewed in Fig. 3, and will crowd thebearing block 14 downward, thus increasing the pressure between thetoggle-trimming members. By turning the adjusting nut 22 in the oppositedirection, the wedge may 'be' released, and the pressure between thetrimming members likewise released. These parts areconstructed in themanner set forth in the patent to Durand, above referred to.

In order to hold the adjusting nut in adjusted position, I have providedthe shank of said nut with a ratchet wheel 23, which is rigidly securedto the shank of the adjusting nut. A locking pawl 24 is pivoted at 25 tothe bracket 8, and has a hooked nose 26, which engages the teeth of theratchet wheel and prevents the adjusting nut from turning in acounterclockwise direction, as viewed in Fig. 2. The pawl 24 is heldin'engagement with the ratchet wheel by a spring 27, which is woundabout the shank of the pivotscrew for the pawl, and engages the tail ofthe pawl, and presses the opposite end of the .pawl against the ratchetwheel. When it is desired to turn the adjusting nut so as to release thepressure between the toggle members, the tail of the pawl may bepressed, the hooked nose thereof thrown out of the ratchet, and theadjusting nut turned, so as torelease the wedge. The ratchet teeth areso constructed that the adjusting nut'may be turned in a clockwisedirection, so as to increase the pressure between the toggle members andthe locking pawl will ride from one tooth to another automatically. Itwill thus be seen that I have provided means for positively locking theadjusting means so that when the toggle trimming members are adjusted toa desired separating pres sure, said members will be locked in saidadjusted position. The teeth of the ratchet wheel may also be used as agage for determining the amount of adjustment, and

directions may be given to turn the adjusting nut one or two teeth ornotches, when it is desired to secure re-adjustment of the trimmingmembers.

It will-be obvious that minor changes in the details of construction maybe made, without departing from the spirit of my invention. 7

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent,is

1. The combination of trimming members, means for adjusting the positionof one trimming member relative to the other including means for holdingsaid trimming members in adjusted position and means for locking saidholding means.

2. The combination of trimming members, means for adjusting the positionof one trimming member relative to the other and for simultaneouslylockingand holding said members in their relative adj ustedpositions.

In testimony whereof I aifix my signature, in presence of two witnesses.

JAMES HINKLEY.

lVitnesses:

JAMES A. SMEALLIE, GEO. SCOTT.

ames of this natent may "2': rotained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

